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Chemistry - 9 Chapter - 7
Solution and Suspension
Test - 7
1.
Solubility of sodium chloride in water is far less than that of sugar.
a) True
b) False
2.
As a general rule solubility increases with the increase in
a) True
b) Temperature
c) False
3.
Define concentration of solution?
a) The amount of a solvent, which has been dissolved in a particular amount of solute , is called concentration of solution.
b) The amount of a solute, which has been dissolved in a particular amount of solvent, is called concentration of solution.
4.
Define dilute solution?
a) A solution, which contains a small amount of a solute as compared to that of a solvent.
b) A solution, which contains a small amount of solvent as compared to that of a solute.
5.
Define concentrated solution?
a) A solution, which contains an access amount of a solute as compared to that of a solvent.
b) A solution, which contains a small amount of a solute as compared to that of a solvent.
6.
A solution, which contains an access amount of a as solvent compared to that of a solute is called concentrated solution.
a) False
b) True
7.
Define freezing mixture?
a) If certain salts are mixed with ice, the temperature of the mixture gets higher. It is called freezing mixture.
b) If certain salts are mixed with ice, the temperature of the mixture gets lowered. It is called freezing mixture.
8.
The lowest temperature which is achieved by mixing sodium chloride with ice is:
a) -14
o
C
b) +12
o
C
c) -6
o
C
d) -12
o
C
9.
The temperature of calcium chloride ice mixture may be as low as:
a) -55
o
C
b) -40
o
C
c) -45
o
C
d) +50
o
C
10.
What do you understand by "percentage by mass'?
a) Mass of a solute present in 1000g of a solution.
b) Mass of a solute present in 100g of a solution.
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